| 1 | Author
| M. Grottel, A. Kozak, Z. Pająk | Requires cookie* | | Title
| *H and 19 F NMR Study of Cation and Anion Motions in Guanidinium Hexafluorozirconate  | | | Abstract
| Proton and fluorine NMR second moments and spin-lattice relaxation times of polycrystalline guanidinium hexafluorozirconate and its deuterated analogue were studied in laboratory (60 MHz) and rotating (H, = 20 G) frames over a wide range of temperature. An analysis of the experimental results enabled us to reveal a dynamical inequivalence of two crystallographically independent cations and an unexpected high mobility of nonspherical anion dimers. A comparison of the ions dynamics in 2:1 complex studied with the guanidinium 1:1 and 3:1 complexes has shown a significant contribution of the hydrogen bonds to the potential barriers hindering the anion reorien-tations. At low temperatures a proton motion in the hydrogen bond and at 400 K a solid-solid phase transition have been discerned. | | |
Reference
| Z. Naturforsch. 51a, 991—996 (1996); received May 14 1996 | | |
Published
| 1996 | | |
Keywords
| NMR, Ion Motions, Hydrogen Bonds, Phase Transitions | | |
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| default:Reihe_A/51/ZNA-1996-51a-0991.pdf | | | Identifier
| ZNA-1996-51a-0991 | | | Volume
| 51 | |
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